The HD Value HDV9875 is an aftermarket rolling-lobe air spring for the drive-axle suspension on International ProStar and related Navistar Class 8 trucks. It replaces Goodyear 1R12-432, Firestone W01-358-9875 / W01-358-1191, and Navistar OEM 3541731C1. The bellows mounts to a 9.00 in top plate and a 10.00 in piston, with extended height 23.79 in and compressed height 5.90 in. Signs You Need a New Air Spring Truck sits low or unevenly across the drive axle Audible air leak from the suspension area Air dryer / compressor cycles constantly to maintain ride height Harsh ride or excessive bouncing over road imperfections Visible cracks, bulges, or tears in the bellows Specifications Manufacturer HD Value Part Number HDV9875 Part Type Rolling-Lobe Air Spring Top Plate Diameter 9.00 in Bottom Plate / Piston Diameter 10.00 in Extended Height 23.79 in Compressed Height 5.90 in Piston Number 4008 Cap Number 2942 Cross References This air spring replaces or is equivalent to the following part numbers: Firestone: W01-358-9875, W01-358-1191 Goodyear: 1R12-432, 1R12-689 Navistar / International: 3541731C1, 2514460C1 Continental ContiTech: AS9875, 9 10B-195P 889 Triangle: AS-81067, AS-8889 Meritor: FS9875, FS1191 World American: WA01-9875, WA01-1191 Newstar: S-22471 FleetPride: 66908 Applications This air spring is used on the drive-axle suspension of: International ProStar (2006–2017) Verify your suspension configuration and existing piston/cap numbers (4008 / 2942) before ordering to confirm fitment.